Add oving0

src/test/java/oving0/HelloWorldTest.java

@@ -0,0 +1,25 @@
+package oving0;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class HelloWorldTest {
+
+    private HelloWorld helloWorld;
+
+    @BeforeEach
+    public void setUp() {
+        helloWorld = new HelloWorld();
+    }
+
+    @Test
+    public void testHelloWorld() {
+        assertEquals("Hello World!", helloWorld.getHelloWorld());
+    }
+
+    @Test
+    public void testHelloWorldLength() {
+        assertEquals(12, helloWorld.getHelloWorldLength());
+    }
+}